Photographic-printing apparatus.



PATENTED SEPT. 6, 1904.

H. H. McINTIRE. PHOTOGRAPHIG PRINTING APPARATUS.

APPLICATION FILED AUG 22 1903 N0 MODEL.

UNITED STATES Patented September 6, 1904-.

PATENT OFFICE.

PHOTOGRAPHlC-PRINTING APPARATUS- SPECIFICATION forming part of Letters Patent No. 769,227, dated September 6, 1904.

Application filed August 22,1903. Se a O- 170,475. (No model.)

To all 2072,0777, it may concern:

Be it known that I, HERVEY H. MGINTTRE, a citizen of the United States, residing at South Bend, in .the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Photographic-Printing Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in photographic-printing apparatus.

The object of the invention is to provide a machine of this character in which the printing period for each picture or the time that the sensitized element is exposed to the light may be predetermined and accurately maintained.

Vith these and other objects in view the invention consists in a vibratory platen adapted to hold the photographic paper on the negative,means for operating the platen,and means adjustable relatively to the platen-operating 7 means for predetermining the time that the platen will be depressed or for setting the machine for operation for a certain period.

For a full understanding of the merits and advantages of my invention reference is to be had to the following description and the accompanying drawings, wherein Figure 1 is a front elevation of the machine with the front of the case broken away to expose the operating mechanism. Fig. 2 is a transverse vertical section on the line m w of Fig. 1. Fig. 3 is a detail in .elevation of the indicator and part of the dial. Fig. 4: is a vertical section of Fig. 3. Fig. 5 is aside elevation of the operating-drum. Fig. 6 is an end elevation of the drum, and Fig. 7 is a detail in elevation of the trip arm or dog mounted on the guide-rod.

Making renewed reference to the drawings, wherein similar reference notations indicate like parts appearing in the several illustrations and reference being had thereto, 1 designates a case or cabinet having a hinged inclined faceboard upon which the negative is detachably posited. This case is adapted to contain a source of artificial light, such aseleetric light,

cesses therein, which extend spirally or diametrically around the circumference. as more clearly shown in Fig. 5. Extending from side to side of the cabinet in front of the drum is a guide-rod 6, on which is mounted for oscillatory movement a frame 7, composed of outwardly-curved arms 8, which carry at their outer ends a hinged platen 9, and these arms are pierced by a rod 10, which braces each arm. Suitable collars 11 may be fitted upon the rod 6 to prevent endwise movement of the platen and its frame.

Slidably mounted upon the rod 6 is a trip arm or dog 12, one end of Which extends inwardly into the path of the segments 5 of the drum 4, and the other end extends outwardly and engages with a cross-rod 13, fitted in the arms 8 of the platen-frame, whereby when the drum 4: is rotated in the direction of the arrow shown in Fig. 2 the dog 12 will be tripped or tilted to depress the platen-frame and the platen and move it downwardly to the position shown in dotted lines in Fig. 2, and in such position it holds the photographic paper in contact with the negative.

It will be apparent from the description thus far given that the trip-arm may be adjusted longitudinally along the guide-rod 6 to a position opposite any one of the segments on the drum, and since the segments are of different length the dog will be tripped and the platen depressed for the period required to print the picture, and that period is regulated by the adjustment of the trip-arm on the guide-rod. Obviously if the trip-arm is opposite and engaged by a long segment the platen Will be tripped and held depressed as long as the segment is in engagement with thedog, and when the drum has rotated sufplaten raised.

ficiently to bring the space between the segments opposite the dog the dog will be permitted to assume its normal position and the Any suitable mechanism may be employed for raising the platen, and none is illustrated in the drawings, as it forms no part of the present invention.

In order to predetermine the period of operation for the platen, I provide a dial or scale and indicator, which cooperates with and controls the adjustment of the dog. The dial or scale 14 is mounted on the outside case and is provided with a series of apertures 15 and numerals 16, which represent the units of time for the operation of the platen and which correspond with the time that the several segments on the drum, are in engagement with the trip-arm.

A lever having an indicator or pointer 17 is pivoted in the front of the case, as at 18, and is provided at its upper end with a pin 19, whichis adapted to be engaged in any one of the apertures 15 of the dial. On the fulcrumpin 18 within the case is an arm 20, which is connected with the dog by a link 21, so that when the pointer is moved to adjust it to any position on the dial the dog will be moved longitudinally upon the guide-rod 6. Thus if it is desired to give a five-seconds exposure the pointer is fixed in the aperture beneath the numeral 5 on the dial, as shown in Fig. 1, and through the medium of the link 21 the dog will be moved on the rod to a position opposite the segment on the drum, which segment will be in engagement with the dog for five seconds, so that the platen will hold the photographic paper in contact with the negative for five seconds. It is obvious that the indicator maybe adjusted to cause the dog to be operated for any desired time, and it is shown in dotted lines in Fig. 1 as adjusted to operate for a period of onesecond, and in such position the dog is opposite and will be engaged by the short segment on the end of the drum. The indicator or pointer and scale being on the outside of the case and its link connection with the platemoperating means being on the inside of the case, adjustments may be conveniently made without opening the case or changing the position of the platen or other parts.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. A photographicprinting apparatus provided with a platen for holding a sensitized element in contact with a negative, means for operating the platen and movable means adapted to be set and operating upon the platenoperating means to predetermine the time for the printing operation.

2. A photographic-p-rinting apparatus provided with a platen, means including two elements for operating the platen, one of said elements being movable relatively to'the other to change the period of operation of the platen,

and means connected with and operating upon said movable element to set the latter and predetermine the period of operation of the platen.

3. A photographic-printing apparatus provided with a platen, means for operating the platen including two elements, one of said elements being movable relatively to the other, and the other element mounted for rotation and having means for engagement with the movable element for different periods, a dial on the case having apertures and characters to indicate the units of time that the rotatable element will be in engagement with the movable element, and an indicator-arm connected with the movable element and provided with a pin adapted to be engaged in any one of the apertures of the dial to hold the movable element in its adjusted position.

4:. In an apparatus of the class described, the combination with a movable platen and its operating means, of means operating upon the platen-operating means to set the latter and change the period of operation of the platen.

5. In a photographic-printing apparatus, the combination with a platen, and platen-0perating means adapted to be adjusted to control the time of exposure, of mechanism connected to the platen-operating means for adjusting the latter and indicating the adjustments.

6. In an apparatus of the class described, a platen, platen-operating means including two elements movable relatively to each other to change the period of operation of the platen, and means for adjusting one of said elements and indicating the adjustments thereof, comprising a scale, a lever, a link connecting one end of the lever with the element to be adjusted, and a pointer at the opposite end of the lever to indicate the adjustment on the scale.

7. In a photographic-printing apparatus, a platen, platen-operating means adapted to be adjusted to change the period of operation of the platen, and means for adjusting the platenoperating means and indicating the adjustments, comprising a scale, a lever having a pointer at its outer end to move over the scale, and a link connection between the platen-operating means andthe lever.

8. In a photographic-printing apparatus, a platen, platen-operating means adapted to be adjusted to change the period of operation of the platen, means for adjusting the platen-operating means and indicating the adjustments comprising a scale, a lever having a pointer at its outer end to move over the scale, a link connecting the lever with the platen-operating means; and means for locking the arm in its adjusted position.

9'. In a photographic-printing apparatus, a case, a platen, platen-operating means in the case, an indicator on the outside of thecase, tween the adjusting device and the platen-opand a connection within the case between the. erating means for adjusting the latter. IO indicator and the platen-operating means for In testimony whereof I afiix my signature in adjusting the latter. presence of two witnesses.

5 10. In a photographic-printingapparatus, a HERVEY H. MOINTIRE.

case, a platen, platen-operating means in the Vitnesses: case, an ad usting device on the outside of the GEORGE OLTSCH, case, and a link connection within the case be- MAGGIE OLTSOH. 

